Unpaved Roadway Geosynthetics

Geosynthetics have been used in various ways in new rail tracks and track rehabilitation for almost three decades. When appropriately designed and installed, Geosynthetics provide a cost-effective alternative to more traditional techniques. There are several problems required to be corrected in railway tracks, increasing the bearing capacity of the subgrade soil, preventing contamination of the ballast by subgrade nes, and dissipating the high pore water pressures built up by cyclic train loading. The woven fabrics or non-wovens are used to separate the soil from the sub-soil without impeding the groundwater circulation where the ground is unstable. Enveloping individual layers with fabric prevents the material wandering off sideways due to shocks and vibrations from running trains.